<template>
  <div class="todo-header">
    <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
  </div>
</template>

<script>
import {nanoid} from 'nanoid'
export default {
    name: 'MyHeader',
    data(){
        return {
            title: ''
        }
    },
    methods:{
        add(){
            // 校验数据
            if(!this.title.trim()){
                return
            }
            //将用户的输入包装成一个对象
            const todoObj = {id:nanoid(), title:this.title, done:false}
            // 通知APP组件去添加一个todo对象
            this.addTodo(todoObj)
            // 情况输入
            this.title = ''
        }
    },
    props:['addTodo']
}
</script>

<style scoped>
    .todo-header input{
        width: 560px;
        height: 28px;
        font-size: 14px;
        border: 1px solid #ccc;
        border-radius: 4px;
        padding: 4px 7px;
    }
    .todo-header input:focus{
        outline: none;
        border-color: rgba(82,168,236,0.8);
        box-shadow: inset 0 1px 1px rgba(0,0,0,0.075), 0 0 8px rgba(82,168,236,0.6);
    }
</style>